True or False: Every primary key of a relation is a superkey No hand written and fast answer with explanation
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True or False: Every primary key of a relation is a superkey
No hand written and fast answer with explanation
Step by step
Solved in 2 steps
- 3) A relation is said to be in 3NF if it is in 2NF and no nonprime attribute of R is blank the primary key. A) an alternate forB) transitively dependent on C) Part of D) partially functionally dependent onE) fully funcionally dependent on3. In mathematical term Row is referred as a. Relation b. Attribute c. Tuple d. DomainDiscuss the differences between the candidate keys and the primary key of a relation.
- TRUE OR FALSE In the Relational Data Model, Referential Integrity Constraint is a special kind/case of Foreign Key Constraint. Multiple Inheritance happens when a class has more than one sub-class. This problem can be observed in Programming Languages as well. Given two relations named A and B, if we q-JOIN A and B, the maximum number of attributes in the result relation could be (the number of attributes of A) times(*) the number of attributes of B). * in an SQL SELECT statement means “all the tuples”. In relational algebra, Cartesian Product (X) can be implemented using the q-JOIN operator. Cartesian Product ISA q-JOIN where q-condition always evaluates to true. SQL is based on Predicate Calculus. A query in SQL always specifies what should be included in the query result.The properties of the relation object can be used to implement the master-detail functionality which most appropriate for your application. You can delete a master-detail relation by selecting it in the Object Navigator and choosing Navigator => Delete. Discuss the Deletion of Relations in detail.Describe three scenarios when a surrogate key should replace a relation's primary key.